/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.mpp.plan.analyze;

import org.apache.iotdb.db.mpp.common.MPPQueryContext;
import org.apache.iotdb.db.mpp.metric.QueryMetricsManager;
import org.apache.iotdb.db.mpp.plan.analyze.schema.ClusterSchemaFetcher;
import org.apache.iotdb.db.mpp.plan.analyze.schema.ISchemaFetcher;
import org.apache.iotdb.db.mpp.plan.statement.Statement;

import static org.apache.iotdb.db.mpp.common.QueryId.mockQueryId;
import static org.apache.iotdb.db.mpp.metric.QueryPlanCostMetricSet.ANALYZER;

/**
 * Analyze the statement and generate Analysis.
 */
public class Analyzer {
    private final MPPQueryContext context;

    private final IPartitionFetcher partitionFetcher;
    private final ISchemaFetcher schemaFetcher;

    public Analyzer(
            MPPQueryContext context, IPartitionFetcher partitionFetcher, ISchemaFetcher schemaFetcher) {
        this.context = context;
        this.partitionFetcher = partitionFetcher;
        this.schemaFetcher = schemaFetcher;
    }

    public Analysis analyze(Statement statement) {
        long startTime = System.nanoTime();
        Analysis analysis =
                new AnalyzeVisitor(partitionFetcher, schemaFetcher).process(statement, context);

        if (statement.isQuery()) {
            QueryMetricsManager.getInstance().recordPlanCost(ANALYZER, System.nanoTime() - startTime);
        }
        return analysis;
    }

    public static void validate(Statement statement) {
        MPPQueryContext context = new MPPQueryContext(mockQueryId);

        IPartitionFetcher partitionFetcher;
        ISchemaFetcher schemaFetcher;
        partitionFetcher = ClusterPartitionFetcher.getInstance();
        schemaFetcher = ClusterSchemaFetcher.getInstance();

        Analyzer analyzer = new Analyzer(context, partitionFetcher, schemaFetcher);
        analyzer.analyze(statement);
    }
}
